Stripping device for bobbions, especially for the weft bobbins of looms



June 21, 1960 G. RaHL 2,941,278

STRIPPING DEVICE FOR BOBBINS, ESPECIALLY FOR THE. WEFT BOBBINS 0F LOOMS3 Sheets-Sheet 1 Filed Oct. 1, 1958 June 21, 1960 /G. RESHL 2,941,278

STRIPPING DEVICE FOR BOBBINS, ESPECIALLY FOR THE WEFT BOBBINS 0F LOOMSFiled Oct. 1, 1958 3 Sheets-Sheer. 2

Fig.3

-3 32 33 ql I /2 Fig. 5 79; o CD 47 29 47 J V f June 21, 1960 G. RQHL2,941,278

STRIPPING DEVICE FOR BOBBINS, ESPECIALLY FOR THE WEFT BOBBINS 0F LOOMSFiled Oct. 1, 1958 s Sheets-Sheet a STRIPPING DEVICE FOR ROBBINS,ESPEQIALLY FGR THE WEFT BOBEENS F LGOM Georg Riihl, 1 Haidschlagweg,Regensburg, Germany Filed Oct. 1, 1958, Ser. No. 764,62

Claims priority, application Germany Mar. 19, 1958 15 Claims. (Cl.28-49) Stripping devices for bobbins or weft carriers are known in whichstripping members are reciprocated by a crank mechanism on guidesarranged parallel to the axis of the bobbin, and engaged and disengagedwith the bobbin by a spring mechanism. These devices are complicated andbig machines. They are useful only with bobbins of a special diameter,and, owing to the parallel guiding of the conical bobbin, a small amountof the remaining filling or yarn cannot be entirely stripped otf. Thereare also devices mounted directly on the looms where the yarn remainingon a bobbin is unwound by turning the bobbin.

The present invention provides a simple and strong stripping device,having simple means for adjustment to any diameter and any angle of coneof the bobbin, and furthermore adapted to be mounted directly on theloom. The principal feature of the stripping device embodying theinvention is that stripping members or jaws are carried by endless pullmeans, for instance endless chains. Two endless pull means maybeprovided for each bobbin at diametrically opposed sides of the latter.These endless chains are simple but strong and adapted to clean thefilling from the bobbin along the entire length thereof. The bobbin withthe remaining filling is transferred from the ejection point of ashuttle to the stripping device by way of an inclined slide with a guidefor the thickened foot of the bobbin. Such guide has a slot above thestripping device with approximately the shape of the spent bobbin withthe remaining filling, so that only a spent bobbin can fall through suchslot. Owing to the shape of this slot bobbins with full filling are madeto pass further along the side into another container. The spent bobbincan fall with its thickened foot uppermost through an enlarged part ofthe slot into a reception slot of the stripping device arranged exactlyunder this enlarged part.

The invention is illustrated by Way of example in the accompanyingdrawings wherein:

Fig. 1 is a side view of the loom with the stripping device mountedthereon;

Fig. 2 is a fragmentary front view of the loom having a stripping deviceaccording to Fig. l;

Fig. 3 is a front view of the striping device on enlarged scale with theprotecting casing removed;

Fig. 4 is a sectional view taken along line IV-lV of Fig. 3, and

Fig. 5 is a top view on the stripping device with the protecting casingpartly broken away.

On the back wall 1 of the casing of the device there (are mounted a pairof upper pivots 2 for chain wheels 4 and a pair of bearing bushes 3 forshafts 3 on which chain wheels 5 are fixed. An endless chain 6 runsaround each chain wheel or sprocket 4 and the associated sprocket 5.These endless chains 6 have runs 6' facing one another and moving alongguide member 7 provided in their upper and lower parts with oblong holes9, 10 extending transversely with respect to the axis of the bobbin 8 tobe stripped off. Bolts 11, 12 extend through Patented June 21, 1960those oblong holes 9, 10 from bars 13 fixed on the back wall 1, and areprovided with adjusting nuts 14, 15. By means of these oblong holes theguide members 7 are adapted to be adjusted transversally to the axis ofthe bobbin. This allows the guide members to be adjusted with respect.to the diameter as well as to the angle of cone of the bobbin 8 and tobe fixed in the adjusted positions by means of the nuts 14, 15. The bars13 carry angle pieces 16 through which screws 17 are screwed to bearagainst guide members 7 and adjust and fix the same.

The endless chains 6 carry stripping jaws 18 for the filling 19 remainedon the bobbin 8, and such jaws are guided close to the bobbin 8 whilemoving along runs 6 for gripping the remaining filling with theirprojecting claws and cleaning the whole length of the bobbin 8. Bysuitably adjusting the guide members 7, the complete stripping off andcleaning of the bobbin 8 is ensured.

Fixed to the back ends of the lower shafts 3 are gears 26 of equal sizein meshing engagement with one another and thus driving the endlesschains 6 in opposite directions (see the arrows) at equal speed. One ofthe shafts 3 is elongated at its back end and there turther carries apulley 2i driven by a belt 22 from a pulley 23 fixed on the main shaft24 of the loom 25 (Fig. 1).

The spent bobbins ejected by a working shuttle 26 are accepted by aninclined slide 27 which is provided with a guide 28 for the foot 29 ofthe bobbin 8. This guide is preferably of rectangular cross-section andthe successive spent bobbins move alongthe guide under the influence ofgravity. Through movement along the slide 2?, each spent bobbin with itsfoot directed upward reaches a point immediately above the strippingdevice where the slide 27 is provided with a slot 30 of approximatelythe shape of the bobbin. As soon as the bobbin has reached the slot, itstapered end falls into this slot and thereby the thickened foot 29 ofthe bobbin 8 is lifted out of its guide 28. The bobbin slides down withits foot 29 moving along the slot 343 in the inclined slide until itreaches an enlargement 31 of the slot 30 through which the thickenedfoot can pass. Thus, each bobbin is made to exit from slide 27 with itsfoot 29 uppermost.

Below this enlargement 31 is a reception slot 33 defined at its oppositesides by two plates 32 spaced apart by a distance smaller than thediameter of the foot of the bobbin.

Thus, the thickened foot 29 of the spent bobbin is suspended from theplates 32 with the tapered end of the bobbin directed downwardly throughthe reception slot in perpendicular position.

A lever 34 is pivotally mounted on a pin 35 located behind the bobbin 8on the back wall 1 of the casing and forms a bellcrank lever with afurther lever 36 fixedly secured to lever 34. The lever 36 lies in thepath of a stop 37 fixed on the chain 6, and is pivoted downwardlyagainst the action of a spring 38 by the action of stop 37 engaginglever 36. Thus the lever 34 is pivoted forwardly and it pushes thebobbin 8 having its foot 29 caught by the reception slot 33, forward outof slot 33 and between cheeks 39 which are displaceable perpendicular tothe axis of the bobbin and urged toward each other by a spring 4d. Thecheeks have the shape of the foot of the bobbin which is provided withthe usual guide rings, and thus yieldably hold the foot of the bobbinthat has been pushed between the cheeks. Above the runs 6' the cheeks 39are each provided with a small arcuate recess 41 corresponding to thediameter of the foot of the bobbin for gripping it tightly. When thefilling 19 remaining on a bobbin is stripped oif by the strippingmembers 18 and after a new bobbin is caught in the reception slot 33,the lever 34 of the bellcrank lever is rocked forwardly by the stop 37engaging lever 36, and this new bobbin is 3 thereby pushed between thecheeks 41 thus pushing the cleaned bobbin into an outlet 4-2communicating with a guiding slot 42' in the front wall of the casingand through which the cleaned bobbin falls into a container 43.

A; flap 46 hingedl'y mounted on the baclc wall at- 45 (Fig. 4: is;rocked by pins 44. carried by the upper end h lever 34 and prevent abobbin from falling behind he lev r 34 when the latter is moved forward.A bridge defining the front end ofthe reception slot 33 is for-Wardly'displaceable against the. action of springs 48. This dlisnlaeeble. arrangement of bridge 47 prevents clamping oi the. bobbins whenthey fall down during the forward movement of the :lever 3:4. The lever36 with its spring 3& isproteeted. by a screen 49 fixed on one of thebars 13.

The pivoting points on the pivots 2 and shafts 3 are lubrica ed by acentralized lubricating system.

Bobbins with full filling cannot pass through the slot 3 and slide downalong the inclined slide 27 to the front edge oi the latter where theypass. into a special container.

which I claim is:

l. A stripping device for removing yarn from a bobbin, said. devicecomprising means for supporting a bobbin from hich yarn is to be.removed, endless flexible members, means guiding said flexible membersfor movement oi th latter along paths having runs extending along theaxi Qfi a bobbin carried by said supporting means, and stripping jawscarried by said endless flexible members to axially; remove yarn from abobbin carried by said supporting means during movement of said jawsalong said 3 .1

2, A, stripping device as in claim 1; wherein each of said endlessflexible members is in the form of an endless chain.

3. A stripping device as in claim 2; wherein said guidi1 3 means toreach of the chains includes a guide member extending along said run ofthe related chain and Slidnblyengaged by the latter, and meansadjustably positioningsaid guide member transversely with respect to theaxis of a bobbin carried by said supporting means at spaced. apartlocations along said run, thereby to accommQ ate. the stripping devicefor use with bobbins having different diameters and difierent coneangles.

4. A stripping device as in claim 3; wherein said guide member haselongated holes extending transversely thereat; said spaced apartlocations, and said means adjustatbly positioning the guide memberincludes fixed bolts extending through said elongated holes and nuts onsaid 4 bolts for securing the guide member relative to the bolts.

5., A stripping device as in claim 4; wherein said means adjustablypositioning said guide member further includes an adjusting screwbearing laterally against said guide member intermediate said locationsof the elongated holes so that the nut on one of said bolts can beloosened and said adjusting screw manipulated to angularly displace. theguide member about the other of said bolts.

6. A stripping device as in claim 1; wherein said runs of the endlessflexible members extend substantially vertically and are spacedlaterally apart; and said means for supporting a bobbin includes a pairof cheeks movable laterally toward and away from each other above saidnuns and adapted to grip the foot of a bobbin between said cheeks sothat the bobbin depends from the latter between said runs, and yieldablemeans urging said cheeks toward each other.

7. A stripping device as in claim 6; wherein said checks have arcuateconfronting surfaces shaped to conform to the contours of the foot of abobbin to be held thereby.

8. A stripping device as in claim 6; further comprising 4. meansdefining a reception slot in back of said cheeks and opening forwardlybetween the latter, said reception slot having a width smaller than thediameter of the foot of a bobbin so that the latter may be inserteddownwardly into said reception slot with the foot of the bobbin disposeduppermost and slidably supported by said means defining the receptionslot.

9. A stripping device as in. claim 8.; flllithct comprisin meansdisposed in back, of said runs at a location intermediate the latter andoperative to move a bobbin supported from said means defining thereception slot forwardly along the latter and into the space betweensaid cheeks for gripping of the foot of the bobbin by the latter.

10. A stripping device as in claim 9; wherein. said means operative tomove a bobbin includes a pivoted lever movable forwardly in a verticalplane from an inoperative position in back of a bobbin suspended fromsaid means defining the reception slot, and means actud y one f iflexible members. tor rockin Said lever forwardly from said inoperativeposition.v

1.1. A stripping device as in. claim, 1Q; wherein said means for rockingsaidv lever includes. a stop. projecting from said one flexible member,an actuating arm fixed relative to said lever and proiecting, forwardlyfrom the latter into the path; of movement of said stop along said r n fth r la d flexi le. member so that said am is deflected. d nward y uponengag ment cf p therewith, and resilient; means urgingsaid. lever toreturn to said inoperative position.

12. A stripping device as in claim 10; further comprising a flappivotally mounted above the. upper end of said lever and having itslower edge position disposed in hunt of said lever so as to deflect eachbobbin forwardly of said lever as the bobbin enters said reception slot.

13. A stripping device as in claim 9; wherein said means defining thereception slot includes a bridge extending laterally across the front ofthe slot, means supporting said bridge for movement toward and away fromsaid reception slot, and yieldable. means urging said bridge rearwardlytoward the reception slot.

14. A stripping device as in claim 9; further comprising an inclinedslide adapted to receive successive bobbins from which yarn is to be.removed and extending over said reception slot, said slide having anelongated opening therein above said reception slot and through whichspent bobbins can pass into the reception slot.

15. A stripping device as in claim 14; wherein one side of said slide ishigher than the other side thereof, and said slide has a guiding memberalong said one. side adapted to receive the foot of a bobbin movingalong the slide, said opening extending laterally from said guidingmemoer so that, when a bobbin reaches said opening, the end of thebobbin remote from its foot commences to fall therethrough and theconsequent tilting of the bobbin lifts the foot of the latter out ofengagement withsaid guiding member to permit the bobbin to slide alongsaid opening toward said other side of the guiding member, said openinghaving an enlarged portion through which the foot of the bobbin can passupon reaching said enlarged portion during. sliding. of the bobbin alongsaid opening.

References Cited in the file of this patent UNITED STATES PATENTS

